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draft-jcurran-v6transitionplan-00.txt --> draft-jcurran-v6transitionplan-01.txt

Expires: January February 1, 2008 July August 2007
Intended status: Informational

An Internet Transition Plan
draft-jcurran-v6transitionplan-00
draft-jcurran-v6transitionplan-01

Status of this Memo

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This Internet-Draft will expire on January Feburary 1, 2008 . 2008.

Abstract

This memo provides one possible plan for transitioning the Internet
from a predominantly IPv4-based connectivity model to a predominantly
IPv6-based connectivity model.

Requirements Language

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].

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Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. A Phased Transition Model . . . . . . . . . . . . . . . . . . . . 2
2.1 Preparation Stage . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Transition Stage . . . . . . . . . . . . . . . . . . . . . . 3 4
2.3 Post-Transition Stage . . . . . . . . . . . . . . . . . . . . 4
3. Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 5
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 5
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6
7.1. Normative References . . . . . . . . . . . . . . . . . . . 5 6
7.2. Informative References . . . . . . . . . . . . . . . . . . 5 6
Appendix A. Change History . . . . . . . . . . . . . . . . . . . . 7
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 6 7
Intellectual Property and Copyright Statements . . . . . . . . . . 6 8

1. Introduction

This memo provides one possible plan for transitioning the Internet
from a predominantly IPv4-based connectivity model to a predominantly
IPv6-based connectivity model.

Other transition plans are possible and this purely informational
document does not create an obligation on any party to undertake any
of the actions specified herein. The use of RFC 2119 requirements
language is purely for the purpose of documenting expectations if a
transition plan were to be adopted by Internet community consensus.

The purpose of specifying this particular transition plan is to allow
for overall assessment of the viability of accomplishing the desired
transition and to begin continue the discussion of Internet-wide transition
plans in general.

2. A Phased Transition Model

It is not reasonable to specify the changes that each and every system
connected to the Internet must undergo in order to achieve the desired
transition, as the number of connected systems precludes creating one
plan that contains such a level of detail. Further, while there are
common scenarios that may be specified for transitioning individual
networks (refer to [RFC3750] [RFC4057] and [CAMP]), [CAMPUS]), the specific
timeline and mechanisms utilized for a given network will be unique.
Despite these challenges, it is necessary to coordinate expectations
on an overall basis so that Internet-wide connectivity is maintained
throughout the transition.

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This plan delineates specific phases for the document specifies a three phase transition activities, plan that includes
preparation, transition, and further breaks downs post-transition phases, and delineates
the necessary activities within each phase based on the role that an
organization plays in the provision and use of Internet services.

An important distinction made in this transition plan is identifying
the explicit requirement for existing end-site organizations to add
IPv6-based connectivity to their public-facing servers during a
transition phase. An accelerated adoption of IPv6 for public-facing
servers enables new organizations in the post-transition phase to be
connected to the Internet only via IPv6 and still have access to a
substantial representative base of publicly available servers.

For nearly every organization, the task of IPv6-enabling their public
facing servers is far easier than undertaking an organization-wide
adoption of IPv6. Still, the requirement for existing Internet
connected organizations to add IPv6 connectivity (even to a small
number of systems) will be a significant hurdle and require a level
of effort which may not be achievable given the lack of compelling
additional benefits to these organizations [RFC1669]. This transition
plan presumes that "connectivity is its own reward" [RFC1958] and
that there still exists a sufficient level of cooperation among
Internet participants to make this evolution possible.

The three proposed phases are: Preparation Phase, Transition Phase,
and Post-Transition Phase.

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to allow entry to the Post-Transition Phase prior to the projected
IPv4 address pool exhaustion date [IPUSAGE].

2.1 Preparation Phase - Present to December 2008 2009

In the Preparation Phase, entities Service Providers ready their IPv6
network services, and end-sites prepare to provide
Internet-facing Internet
facing services via IPv6-based connectivity while continuing
to provide Internet-facing services via IPv4 connectivity.

During the Preparation Phase, the following principles apply:

2.1.1 Service Providers SHOULD offer IPv6-based Internet Service
to their Internet customers. IPv6-based Internet Service
MAY be provided via IPv6 transition mechanisms as described
in [RFC4213] or via native IPv6 network service.
2.1.2 Organizations SHOULD arrange for IPv6-based Interent Internet
connectivity for any Internet-facing servers (e.g. web,
email, and domain name servers). Internet-facing IPv6
servers MAY be treated as in this phase SHOULD use separate service names
per [RFC4472] to avoid impact to production by IPv4-based
services unless the organization,
but MUST NOT be treated as organization supports production by other Internet
organizations.
IPv6 connectivity.
2.1.3 Organizations MAY provide IPv6-based Internet connectivity
to internal user communities.

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2.2 Transition Phase - January 2009 2010 to December 2010 2011

In the Transition Phase, entities Service Providers offer production
IPv6 and IPv4 services to their Internet customers. End-sites
provide Internet-facing services in a production manner via
IPv6-based connectivity in addition to IPv4-based connectivity.

During the Transition Phase, the following principles apply:

2.2.1 Service Providers MUST offer IPv6-based Internet Service to
their Internet customers. IPv6-based Internet Service SHOULD
be via native IPv6 network service but MAY be via IPv6
transition mechanisms if necessary.
2.2.2 Organizations MUST arrange for IPv6-based Interent Internet
connectivity for any Internet-facing servers (e.g. web,
email, and domain name servers). Internet-facing IPv6
servers SHOULD be treated as production by the organization,
and MAY SHOULD be treated as production by other Internet
organizations.
2.2.3 Organizations SHOULD provide IPv6-based Internet connectivity
to their internal user communities, and provide IPv6 internal
supporting servers (e.g. DNS, DHCP). IPv6-based Internet
connectivity MAY be via native IPv6 network service or MAY
be via IPv6 transition mechanisms.

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2.3 Post-Transition Phase - January 2011 2012 to the Future

In the Post-Transition Phase, entities End-Sites provide all Internet-facing
services via IPv6-based connectivity. connectivity, thus allowing for new Internet
customers connected solely by IPv6.

During the Post-Transition Phase, the following principles apply:
2.3.1 Service Providers MUST offer IPv6-based Internet Service to
their Internet customers. IPv6-based Internet Service SHOULD be
via native IPv6 network service but MAY be via IPv6 transition
mechanisms if necessary. IPv6-based Internet Service SHOULD be
treated as production by other Internet organizations.
2.3.2 Organizations MUST arrange for IPv6-based Internet connectivity
for any Internet-facing servers (e.g. web, email, and domain
name servers). Internet-facing IPv6 servers MUST be treated
as production by the organization, and SHOULD be treated as
production by other Internet organizations.
2.3.3 Organizations SHOULD provide IPv6-based Internet connectivity to
internal user communities, and provide IPv6 internal supporting
servers (e.g. DNS, DHCP) IPv6-based Internet connectivity MAY
be via native IPv6 network service or MAY be via IPv6 transition
mechanisms.
mechanisms as described in [RFC4213].
2.3.4 Service Providers area MAY continue to offer IPv4-based Internet
connectivity to their customers. Organizations MAY continue to
use IPv4-based Internet connectivity. Organizations MAY remove
IPv4-based

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3. Summary

In order to facilitate full Internet-wide connectivity during the
transition from IPv4-based connectivity to IPv6-based connectivity,
a transition plan which provides clear guidance to organizations
regarding expectations is necessary. As the specific expectations
change over time, and vary greatly by organization, a phased approach
is specified in this document, with the timeline for each phase set
with the intention of allowing enough time for the necessary planning
and deployment steps which each organization much undertake. This
Internet Transition Plan provides for transition to predominantly
IPv6-connectivity by January 2011 2012 which, with careful management, may
meet the overall requirements of allowing the Internet to scale as
specified in "The Recommendation for the IP Next Generation Protocol"
[RFC1752].

4. Security Considerations

This memo describes the transition of the Internet from IPv4-based
connectivity to predominantly IPv6-based connectivity. This change
inherently has security implications due to the widespread deployment
of a new version of the Internet Protocol but these are beyond the
scope of this document and are covered in [IPV6SEC]. This document
raises no new security issues itself.

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5. IANA Considerations

While no new name or identifier space is created by this document,
the policies for management of Internet Protocol version 4 (IPv4)
address space (which were formed in accordance with [RFC2050]) may not provide for IPv4 availability through the
Transition Phase as intended by this plan. The IANA should continue work with
all parties to encourage sufficient develop policies per [RFC2050] which allow continued
general availability of IPv4 address resources as
necessary to support sufficiently long for
any resulting transition plan that receives
wide-spead adoption. widespread community support.

6. Acknowledgments

We are grateful for

This document would not been possible without the many thoughtful abundant comments
and helpful suggestions made by members of the Internet community, and in
particular would like thanks are due to thank Jim Bound, Scott Bradner, Randy Bush,
Geoff Huston, Chris Morrow, Ken Shores, James Woodyatt, David Divins,
and Jordi Palet for their thoughtful reviews review and suggestions for improvement.

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7. References

7.1. Normative References

[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.

[RFC4213] Nordmark, E. and R. Gilligan, "Basic Transition
Mechanisms for IPv6 Hosts and Routers", RFC 4213,
October 2005.

[RFC4472] Durand, A., Ihren, J., and P. Savola, "Operational
Considerations and Issues with IPv6 DNS", RFC 4472,
April 2006.

[RFC1752] Bradner, S., Mankin, A.," The Recommendation for the
IP Next Generation Protocol", RFC 1752, January Feburary 1995.

7.2. Informative References

[RFC1958] Carpenter, B., "Architectural Principles of the Internet",
RFC 1958, June 1996.

[RFC1669] Curran, J., "Market Viability as a IPng Criteria",
RFC 1669, August 1994.

[IPUSAGE] IPv4 Address Report, August 2007, by Geoff Huston.
<http://www.potaroo.net/tools/ipv4/index.html>

[RFC4057] Bound, J., Ed., "IPv6 Enterprise Network Scenarios",
RFC 4057, June 2005.

[RFC3750] Huitema, C., Austein, R., Satapati, S., and R. van der Pol,
"Unmanaged Networks IPv6 Transition Scenarios", RFC 3750,
April 2004

[CAMP]

[CAMPUS] Chown, T., "IPv6 Campus Transition Scenario Description and
Analysis", (Work in Progress), March 2007.

[RFC2050] Hubbard, K., Kosters, M., Conrad, D., Karrenberg, D., and
J. Postel, "Internet Registry IP Allocation Guidelines",
BCP 12, RFC 2050, November 1996.

[IPV6SEC] Davies, E., "IPv6 Transition/Co-existence Security
Considerations", draft-ietf-v6ops-security-overview-06
(Work in Progress), October 2006.

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Appendix A. Change History

Changes from -00 version to -01 version:

o Expanded discussion of phased transition model.

o Extended Preparation phase by one year to reflect overwhelming
community concern about the state of IPv6 readiness.

o Clarified use of IPv6 services in Preparation phase to advise
caution with respect to DNS interactions per RFC 4472.

o Removed last sentence of Post-Transition phase from removal
of IPv4-based connectivity. Removal of IPv4 is considered
out of the scope of this document.

o Updated Introduction to clarify use of RFC 2119 terminology
despite inherently non-standards nature of this document.

o Corrected misc typographic errors

o Updated acknowledgments section

Author's Address

John Curran
99 Otis Street
Cambridge, MA USA 20190

Email: jcurran@istaff.org

Full Copyright Statement

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This document and the information contained herein are provided on an
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THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

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